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The ionization energy of hydrogen atom is -13.6eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is (Avogadro's co
addition of different regent in sample of salt changes its colour
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
How is chemistry important in medicine & healthcare?
does coal flue gas react with sand or glass.. if so under what conditions??
Half life of reaction refers to as the time during which the concentration of the reactants is reduced to half of the initial concentration or it is the time essential for the comp
explain how adsorption as a method of water treatment
Pig iron is cast iron with a very high carbon content: 4% by weight or more. Cast iron has at least 2% carbon by weight. Less than that, and it''s steel. Cast iron and pig iron are
The difference among Threshold energy and average energy of the molecules is known as activation energy.
Explain variations of electronegativity in group & period
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